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A well path petrological facies calibration method

A well trajectory and rock technology, applied in the field of drilling trajectory lithofacies calibration, can solve the problem of no direct guidance for shale oil and gas production

Active Publication Date: 2016-10-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, lithofacies research still belongs to the traditional category and has no direct guiding effect on shale oil and gas production

Method used

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  • A well path petrological facies calibration method
  • A well path petrological facies calibration method
  • A well path petrological facies calibration method

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Embodiment Construction

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects. It should be noted that, as long as there is no conflict, each embodiment of the present invention and each feature of each embodiment can be combined with each other, and the formed technical solutions all fall within the protection scope of the present invention.

[0035] Meanwhile, in the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to those skilled in the art that the present invention may be practiced without the specific details or in the specific manner described herein.

[0036] Additiona...

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Abstract

The invention provides a well path petrological facies calibration method. The method comprises the steps of dividing a rock section of a selected standard well into petrological facies of different types according to preset stratum parameters to obtain a petrological facies division result of the standard well, and extracting the characteristic marks of each type of the petrological facies to obtain a characteristic petrological facies of the standard well; performing vertical projection on a well path of a horizontal section of a to-be-analyzed well and a well-logging curve to obtain a projection path and a projection well-logging curve; according to the projection well-logging curve and the petrological facies division result of the standard well and based on the characteristic petrological facies of the standard well, acquiring the petrological facies types which the projection path encounters in drilling and further determining the petrological facies which the well path of the horizontal section of the to-be-analyzed well penetrates, thereby acquiring the petrological facies calibration result of the well path of the horizontal section of the to-be-analyzed well. The method can determine petrological facies directly and accurately, select preferable fracturing sections rapidly, promote oriented or secondary fracturing and feed back optimized drilling steering and is of great importance for the exploration and development of unconventional resources.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for calibrating rock facies of drilling track. Background technique [0002] In recent years, the exploration and development of shale oil and gas has been developing rapidly around the world. However, how to finely divide large sets of monotonous shale sections and determine the best drilling horizons is a difficult problem in shale oil and gas exploration and development. Existing researchers and staff usually use traditional petrographic methods to analyze shale reservoirs. [0003] Lithofacies refers to a "material representation" of a rock unit or depositional environment that can be objectively described, such as cross-bedded sandstone facies, flysch and the like. Today, with the impact of the "shale gas revolution" and the application of high-resolution technologies (nano CT, 3D FIB, etc.), the microstructure and formation mechani...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 龙胜祥彭勇民武清钊胡宗全李军高波路菁曹艳聂海宽杜伟
Owner CHINA PETROLEUM & CHEM CORP
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